Rotary pump



NAFETERS, FHOTO-LITHOGRAPHER. WASHINGYON. IFC.

UNITED STATES FATENT OFFTCE.

JOHN BROUGHTON, OF CHICAGO, ILLINOIS.

ROTARY PUMP.

Specification forming part of Letters Patent No. 15,059, dated June 10, 1856; Reissued September 10, 1856, No. 39'?.A

To all whom t may concern:

Be it known that I, JOHN BROUGHTON, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved Rotary Pump; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figures 1 and 2 are elevations at right angles to each other of the improved pump adapted to the raising of water. Fig. 3, is a vertical section in a plane passing through the axis of rotation of the eccentric piston A. Fig. 4, is a vertical section of the oscillating barrel O, and piston A, in a plane perpendicular to the aXis o frotation of the piston. Fig. 5, is a similar section to Fig. 4, b-ut with the piston in a diiferent position. Fig. 6, is an external view of the barrel.

Similar letters of reference indicate corresponding parts in the several figures.

The distinguishing characteristic of this pump consists of its being composed of a rotary eccentric piston fitted within a barrel which derives an oscillating movement from the rotary movement of the piston while the piston, by its rotation, combined with the oscillation of the barrel, is caused to move reciprocally toward and from each end of the barrel and thereby without the aid of valves alternately to form a vacuum to draw water into either end of the barrel through a suitable inlet and force it outl again through a suitable outlet.

A, is the piston which is of metal of cylindrical form, hollow and with open ends, and secured to a hollow shaft B, which is eccentric to, but parallel with its axis and is supported and fitted to rotate in stationary bearings, supported on standards F, F. The sha-ft B, is hollow and has a transverse partit-ion (Z, at about the middle of the piston, which separates one portion which is to serve as an inlet from the suction pipe G, to the barrel C, from the other portion which is to serve as an outlet from the barrel O to the discharge pipe I. The inlet portion of the shaft is closed at its extremity to make it solid to attach a hand crank J, or other suitable means of driving it and its communication with the suction pipe Gr, is made by forming a chamber H, around one of it-s bearings, providing slots in the bearing as shown at e, e, Fig. 3, and attaching the suction pipe to the said chamber, the ends of which are packed around the shaft with stuiing boxes L, 71 as shown in Fig. 3. The open extremity of the outlet portion of the shaft is connected with the discharge pipe I. The inlet portion of the shaftconnects with a hollow arm or passage L running through the piston and terminating in the periphery thereof and the outlet portion connects with an air chamber N, cast within the piston, and from this air chamber there is a passage M, terminating in the periphery of the piston diametrically opposite the termination of the passage L.

The barrel O, which contains the piston A, is of metal. It is, in its transverse section or in its section taken in any plane parallel with the axis of rotation of the piston, of quadrangular form, as shown in Fig. 3, but in its section perpendicular to the axis of the piston, it is of the form of a figure having two parallel sides and two arched ends, as shown in Fig. 4. It is firmly attached to an arm D, which is fitted to oscillate freely on a fixed pivot or shaft E, secured in the standards F, F. It is made in six parts, viz: the two parallel side plates a., a, the arched ends b, Z), and the face plates o, c, all bolted together. The face plates e, e, are provided each with a slot g, described from the center of oscillation E, of the barrel to allow the shaft B of the piston to pass through and admit of the oscillation of the barrel. The piston fits between the side plates a, a, and face plates c, c, which are all faced truly, the periphery of the piston being in contact with the plates a, a, and the ends thereof with the face plates o, c. The periphery of the piston does not require to be fitted with packing as the side plates o, a, may be adjusted to compensate for wear, but the ends of the piston may be fitted with metal packing rings to work in contact with the face plates c, c, and rings of india rubber or springs may be placed behind these rings to keep them in contact with the face plates with very little friction.

The operation of the pump is as follows. Rotary motion being communicated to the piston by power applied to its shaft, it gives to the barrel an oscillating movement and makes a reciprocating movement within the barrel alternately enlarging and contracting the space between it and either end of the barrel, at each stroke forming a vacuum on one side of the piston, into which the water is drawn through the suction pipe and driving out from the barrel on the other side of the piston, the water which was drawn in at the previous stroke.l Supposing the piston, in rotating in the direction of t-he arrow shown in Fig. 4, to have arrived at the upper end of its stroke or at its position nearest the top of the barrel, as shown in that figure, the lower portion of the barrel will be filled with water which came in through the hollow arm or passage L, as the piston moved up in the barrel. The opening of the said hollow arm or passage L, is just below the point of contact of the straight portion of the barrel and the periphery of the piston, which the opening of the passage M, in the other side of the piston kis just above the point of contact, consequently a slight motion of the piston beyond this position cuts off the communication of L, with the lower part of the barrel and brings it in communication with the upper part thereof, as the piston moves down, while the same mot-ion brings the opening of the arm M, in communication with the water below the piston, and as the piston moves down, water is drawn into the upper part of the barrel through the suction pipe and the passage L and forced out the lower Y part through the passage M, and chamber N, to the discharge pipe. When the piston has made half a revolution and arrived to its position nearest the bottom of the barrel, the ports of ingress and egress assume relatively the same positions as when it was at the top, and as the piston moves up in the barrel by its own continued revolution, the action of the pump is exactly the same as when it moves down with the exception that the water enters below and is discharged from above.

The position of the barrel of the pump may be the reverse of that represented in the drawings, that is to say, the barrel may be suspended below its center of oscillation, like a pendulum.

The pump may be used either for raising water or as a force pump.

Vhat I claim as my invention and desire to secure by Letters Patent is,

A rotary pump composed of a rotating eccentric piston working within an oscillating barrel with any arrangement of inlet and outlet passages, substantially as herein set forth. Y

JOHN BROUGHTON. Witnesses:

CALVIN D. VOLF, B. B. STITES.

[FIRST PRINTED 1912.] 

